BBK Performance 15410 - Manual

4.6L GT & Cobra Mustang Full-Length
Header/H-Pipe or X-Pipe for Standard
Transmissions Only
INS-056
Step 1 Raise front of vehicle on safety ramps or jackstands to allow clearance for long header installation, if available a
vehicle hoist would be highly recommended.
Step 2 Disconnect negative battery terminal, make sure vehicle is securely raised with safety chocks in place, etc.
CAUTION
Use extreme caution when working under vehicle.
Always use a secondary safety jacking device
Step 3 Working from under the vehicle, first remove the exhaust H-pipe by disconnecting at the exhaust manifolds,
mufflers pipes and also be sure to unplug all 4 oxygen sensors.
Step 4 Working from under the hood, disconnect the emissions tubes from both exhaust manifolds, then unbolt and
remove the strut tower brace to allow for clearance while lifting the engine on the passenger side.
Step 5 Working from under the vehicle unbolt and remove the starter and then the passenger side exhaust manifold.
Step 6 Unbolt the steering shaft pinch bolt (located on the driver’s side just above the steering rack at the rubber coupler
or “rag joint”). Pull the steering shaft up off of the splines on the steering rack and swing the shaft to the driver’s
side of the engine compartment. Unbolt and remove the driver’s side exhaust manifold.
Step 7 To facilitate installation of the header on the passenger side, first remove the engine crossmember support bar
(G-load brace), then remove the motor mount nut on the passenger side to allow the motor to be jacked up
approximately 3-4 inches.
Step 8 Using a floorjack and a piece of wood placed on the oil pan bolt rail, slowly raise the motor enough to allow the
header to be slid in place. Place another piece of wood as a safety block between the motor mount and engine
crossmember until the header is installed completely with supplied gasket/hardware. The starter motor must also
be installed simultaneously with the passenger side header due to tight clearances.
Step 9 Lower the motor and reinstall the motor mount nut, then simply slide the driver’s side header into place and
install with supplied gasket/hardware.
Step 10 Reinstall the steering shaft to steering rack and torque the bolt to factory specifications, then reinstall the
crossmember support bar. At this point check for any interference or clearance problems between the driver’s
side header and steering shaft.
Step 11 Install the new BBK H-pipe assembly using the supplied hardware, first tighten the flanges at the header
collectors, then tighten at the muffler pipes.
NOTE
Install the oxygen sensors to the H-pipe before
fitting to the vehicle to ease installation
Step 12 From under the hood simply reconnect the emissions tubes to the appropriate fittings on the headers and reinstall
the strut tower brace.
Step 13 Safely lower the vehicle and reconnect the negative terminal to the battery, start your vehicle and check for leaks
or loose hardware.
CAUTION
Make sure the steering shaft bolt has been tightened!
I N S T A L L A T I O N I N S T R U C T I O N S
w w w . B B K P E R F O R M A N C E . c o m
IMPORTANT—All appropriate safety equipment (e.i., gloves, tools) must be used during the installation of this product(s).
BBK Performance, Inc. accepts no responsibility for injuries resulting in the installation of any product(s).